Bindings for DataGridView hosted in an MFC application

A WinForms DataGridView control has the ability to automatically generate its columns and populate from a specified data source (which can be a DataSet, a simple list or something else). All you have to do is something like this:

When you do the same in MFC, it doesn’t work (supposing that you followed all…

Second CDatabase bug in MFC in Visual Studio 2012

I was writing recently about an MFC bug in CDatabase class in Visual Studio 2012. In the meanwhile I have stumbled upon an even greater bug (check this report on Connect for the details): when the OpenEx function fails (wrong credentials, service not reachable, machine is shot down etc.) it corrupts memory. What happen next…

CDatabase bug in MFC in VS2012

After migrating an MFC application from Visual Studio 2008 to Visual Studio 2012 I run into an unexpected error: the application was having problem fetching data from the SQL Server database. After debugging it turned out that function CDatabase::GetConnect that I was using to retrieve the connection string after opening the database (for different purposes)…

A tale of two flags: DS_CONTROL and WS_EX_CONTROLPARENT

I recently ran into problems with an MFC application that was hosting some Windows Form user control in a modal dialog; the application hanged after it lost focus. The problem was the window received WM_GETDLGCODE message in an infinite loop making it impossible to handle anything else. After a lot of digging, I found that…

Sorting a CTreeCtrl

The CTreeCtrl supports several ways to sort its content: InsertItem allows to insert the child item alphabetically, when specifying TVI_SORT for hInsertAfter SortChildren performs an alphabetical sorting of the child items of the given parent item in a tree SortChildrenCB performs a sort with a user-defined callback (hence the CB suffix) of the children of…

File Dialog with Custom Controls

Sometimes you want to customize a file dialog, maybe to provide a preview for images or files in general. Fortunately, the common file dialog can be easily extended to achieve this. I will explain in this post how to do that. There are several things one needs to do to extend the file dialog. First…

.NET out string[] to Automation SAFEARRAY**

.NET allows you to expose components as COM and consume them from unmanaged code. There are many references on how to this (and you can only start with MSDN), and I will not talk about that part. What I want to explain here is something different. Suppose you have this interface:

Method GetUsers() returns…